1534686440 has 32 divisors (see below), whose sum is σ = 3946337280. Its totient is φ = 526178112.

The previous prime is 1534686437. The next prime is 1534686451. The reversal of 1534686440 is 446864351.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2740232 + ... + 2740791.

It is an arithmetic number, because the mean of its divisors is an integer number (123323040).

Almost surely, 2^1534686440 is an apocalyptic number.

1534686440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1534686440 is an abundant number, since it is smaller than the sum of its proper divisors (2411650840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1534686440 is a wasteful number, since it uses less digits than its factorization.

1534686440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5481041 (or 5481037 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 1534686440 is about 39175.0742181811. The cubic root of 1534686440 is about 1153.4706594326.

The spelling of 1534686440 in words is "one billion, five hundred thirty-four million, six hundred eighty-six thousand, four hundred forty".